Tread portion of an automobile tire



FIG. 1 is a perspective view of the top, front and right side of a tread portion of an automobile tire showing my new design, it being understood that the tread pattern repeats uniformly throughout the circumference of the tire;

FIG. 2 is a front elevational view thereof, the top and bottom plan views being identical thereto;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is an enlarged fragmentary front elevational view thereof; and,

FIG. 7 is a cross-sectional view taken along the line 7—7 in FIG. 6 thereof.

The elements shown in broken lines are for illustrative purposes only and do not form any part of the claimed design. 

The ornamental design for a tread portion of an automobile tire, as shown and described. 